Unit 17: Electric Circuits

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1. Which factor increases electric power?

A Decrease in voltage

B Decrease in current

C Increase in voltage

D Increase in resistance

2. Which graph represents Ohm’s law?

A Current vs Resistance

B Voltage vs Resistance

C Current vs Voltage

D Power vs Voltage

3. The main source of electricity in homes is:

A Battery

B Generator

C Power station

D Solar cell only

4. If voltage across a resistor is doubled, the current will:

A Remain same

B Become half

C Double

D Become zero

5. The electromotive force (EMF) of a cell is measured in:

A Ampere

B Ohm

C Volt

D Watt

6. A fuse is used in a circuit to:

A Increase current

B Measure voltage

C Prevent overheating

D Store charge

7. The SI unit of electric current is:

A Volt

B Ohm

C Ampere

D Watt

8. The material used for making fuse wire should have:

A High melting point

B Low melting point

C High resistance

D Low resistance

9. Which color is usually used for the live wire?

A Green

B Blue

C Brown

D Yellow

10. Electric power can be calculated using the formula:

A P = IR

B P = V/I

C P = VI

D P = R/I

Unit 17: Electric Circuits

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